1 files changed, 94 insertions, 0 deletions
diff --git a/drivers/pci/pwrctrl/pci-pwrctrl-pwrseq.c b/drivers/pci/pwrctrl/pci-pwrctrl-pwrseq.c
new file mode 100644
index 000000000000..e9f89866b7c2
--- /dev/null
+++ b/drivers/pci/pwrctrl/pci-pwrctrl-pwrseq.c
@@ -0,0 +1,94 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2024 Linaro Ltd.
+ */
+
+#include <linux/device.h>
+#include <linux/mod_devicetable.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/pci-pwrctrl.h>
+#include <linux/platform_device.h>
+#include <linux/pwrseq/consumer.h>
+#include <linux/slab.h>
+#include <linux/types.h>
+
+struct pci_pwrctrl_pwrseq_data {
+	struct pci_pwrctrl ctx;
+	struct pwrseq_desc *pwrseq;
+};
+
+static void devm_pci_pwrctrl_pwrseq_power_off(void *data)
+{
+	struct pwrseq_desc *pwrseq = data;
+
+	pwrseq_power_off(pwrseq);
+}
+
+static int pci_pwrctrl_pwrseq_probe(struct platform_device *pdev)
+{
+	struct pci_pwrctrl_pwrseq_data *data;
+	struct device *dev = &pdev->dev;
+	int ret;
+
+	data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
+	if (!data)
+		return -ENOMEM;
+
+	data->pwrseq = devm_pwrseq_get(dev, of_device_get_match_data(dev));
+	if (IS_ERR(data->pwrseq))
+		return dev_err_probe(dev, PTR_ERR(data->pwrseq),
+				     "Failed to get the power sequencer\n");
+
+	ret = pwrseq_power_on(data->pwrseq);
+	if (ret)
+		return dev_err_probe(dev, ret,
+				     "Failed to power-on the device\n");
+
+	ret = devm_add_action_or_reset(dev, devm_pci_pwrctrl_pwrseq_power_off,
+				       data->pwrseq);
+	if (ret)
+		return ret;
+
+	pci_pwrctrl_init(&data->ctx, dev);
+
+	ret = devm_pci_pwrctrl_device_set_ready(dev, &data->ctx);
+	if (ret)
+		return dev_err_probe(dev, ret,
+				     "Failed to register the pwrctrl wrapper\n");
+
+	return 0;
+}
+
+static const struct of_device_id pci_pwrctrl_pwrseq_of_match[] = {
+	{
+		/* ATH11K in QCA6390 package. */
+		.compatible = "pci17cb,1101",
+		.data = "wlan",
+	},
+	{
+		/* ATH11K in WCN6855 package. */
+		.compatible = "pci17cb,1103",
+		.data = "wlan",
+	},
+	{
+		/* ATH12K in WCN7850 package. */
+		.compatible = "pci17cb,1107",
+		.data = "wlan",
+	},
+	{ }
+};
+MODULE_DEVICE_TABLE(of, pci_pwrctrl_pwrseq_of_match);
+
+static struct platform_driver pci_pwrctrl_pwrseq_driver = {
+	.driver = {
+		.name = "pci-pwrctrl-pwrseq",
+		.of_match_table = pci_pwrctrl_pwrseq_of_match,
+	},
+	.probe = pci_pwrctrl_pwrseq_probe,
+};
+module_platform_driver(pci_pwrctrl_pwrseq_driver);
+
+MODULE_AUTHOR("Bartosz Golaszewski <bartosz.golaszewski@linaro.org>");
+MODULE_DESCRIPTION("Generic PCI Power Control module for power sequenced devices");
+MODULE_LICENSE("GPL");